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A computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are, in short, a perfect match.
— Bill Bryson

If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on and the dedication to go through with it.
— John Carmack

Good code is its own best documentation. As you're about to add a comment, ask yourself, 'How can I improve the code so that this comment isn't needed?' Improve the code and then document it to make it even clearer.

There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies.

I had a specific answer in mind for my bounty originally, but I discovered you can't apply them instantly! So I let it runs its course, and even though there's about a day left, this is my favorite answer from the past week. One I'd heard before, but never knew who said it. Thanks!
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Roger PateOct 14 '10 at 0:42

That story still galls me. Imagine that, Dr. Richard Feynman, according to the book I read, had to threaten to withhold his signature unless his account of the accident was included in the official report. It was included as an appendix, so as to say, "The official investigation is over, and now here is some speculation from this eccentric."
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Mark CSep 28 '10 at 12:59